Canada has passed the USA in percentage of population that is fully vaxxed. This is bittersweet. I mean, yay us, but also it is so sad that hesitancy is so high in the US.
This study found that patients caught COVID-19 from infected roommates 39% of the time. However, they also found that with aggressive COVID-19 testing, an uninfected person got an infected roommate only 0.3% of the time.
This article is about attempts to sniff COVID-19 in people’s breaths.
This article is about Delta.